/Engine/Source/Runtime/AnimGraphRuntime/Public/PlayMontageCallbackProxy.h
class UPlayMontageCallbackProxy : public [UObject](API\Runtime\CoreUObject\UObject\UObject)
FOnMontagePlayD...
OnBlendOut
Called when Montage starts blending out and is not interrupted.
FOnMontagePlayD...
OnCompleted
Called when Montage finished playing and wasn't interrupted.
FOnMontagePlayD...
OnInterrupted
Called when Montage has been interrupted (or failed to play)
FOnMontagePlayD...
OnNotifyBegin
FOnMontagePlayD...
OnNotifyEnd